c) Which of the following is an example of a reversible change? i. A tomato ripens when it is left in open. ii. When a woollen cloth is washed in hot water, it shrinks. iii. When sugar is added to water and the mixture is stirred, it dissolves. iv. When the biscuit dough is heated, it becomes hard.
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opt -2nd is correct
when woollen clothes washed in hot water
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